Hot-blast stove



L. M. HARTWICKAND P. J. BROWN.

HOT BLAST STOVE.

APPLICATION-FILED JAN. 20, 19:9.

- Patented May 16,1922.

// 2 SHEETS-SHEET I.

L. M. HARTWICK AND P. J. BROWN.

HOT B STOVE.

APPLICATION JAN. 20, 1919.

2 SHEETS-SHE: b

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LOUIS M. HAn'rwroK AND PATRICK 3'. ROWN, or ctnvarnnn, onto; SAID Hana-1 WiCK assrenon or HIS ENTIR -arena: TO THE rnnzrna si-rnnr. COMPANY, OF CLEVELAND, ozaranconronarioivor 01110. '1.

To all whom Emery concern;

Be it known that we, Louis M. HARrWIoK and PATRICK J. BROWN, citizens of the: United States, residing at Cleveland, in the county ofCuyahoga and State. of Ohio, have:

work. we are enabled to employ for the bottom or. foundation course single unitrbricks or blocks; also to use for all of the courses above such bottom or foundation'course single unit bricksor blocks.

We .accomplish these results in; and

through the construction and arrangement.

ofparts shown" in the drawings forming'part hereof wherein Fig.1 represents a central vertical sectional 'viewthrough a hot' blast stove containing our invention; Fig. 2 a

' sectional view through the stove shownin Fig. 1, the quadrants ofFig. 2 corresponding respectively to the section lines a-a, Zi-b,

c--0, and cld of Fig. 2, being indicatedat a, Z), 0 and (Z, respectively; Fig. 3 a sectional view corresponding to the line of Fig.

1; Fig. 4 a sectional view corresponding to central transverse fine 3. The base 1 is preferably circular in outline and supports at. its peripheral portion and externally of HGT-BLAST STOVE.

Specification of Letters Patent. P t t Application filed. January 20, 1919. Serial No. 272,003.

the flue 2 'an annular-wall 4 preferably of masonry. (suchas brick work); also,iwith-, nthe outer wall 4 and also within the flue 2,

thebase supports an inner annular wall 5,

Which may be constructed of material similar to that 'eniployedin the production of the wall 1. 6 denotes a dome. supported by the outer wall- 4. This dome is also prefer-. ably formed ofmason ry and is provided with a centralopening having a removable closure Ma 1c, 1922.

8. The outer masonry wall and the dome are enclosed by a sheet'metal covering 9, provlded at itsupper end with anopenin'g 10 havlng a collar 11 surrounding the same.

Above the base liand extending through the-walls' and 5, is a conduitlEZ which may be conveniently formed within 'a masonry arch 13 supported on said base, the inner endofsaid passageway communicating with "the central vertical chamber 11 enclosed by the, wall 5. Oppositexthe conduit/12 is a con duit 15, which also extends through'the walls 4 and 5 and whichmayalso be formed within a masonry arch -16supportedon the base.-

Beneath the arches 13 and 16, the flue 2 is provided withisuppoiting arches 17 for the conduits thereabove. The flue 3, which is locatedwithin the base 1, is provided with an arch 18 at the'top thereof. The outer end of the conduit 15 communicates with a vertical conduit19 from which there extends a conduit 20. In theconduit 19 is located a Valve 21 cooperating with a seat 22, the" stem 23 of; said valve being providedi with a chain or other flexible operating device 2 1 provided with a counterweight 25 and -,ex-

tending over a sprocket 26, the shaft of which is provided with a hand "wheel 27.

' The annular flue'2 extends upwardly from base of the chamber28. These arches and their extensions, together with the ledges 31 and 32, provide supports for the bars on which the checker work is carried.

Communicating with the lower portion of the fine 2 is an'inlet connection 33 extending through the outer portion of the base 1. Opposite this connection is an outlet connection 33 having a cover 3 by the removal of which the connection 33 may be placed in communication with a chimney (not shown).

35 denotes a bar, one end of which is sup-.

portedupon the longitudinal central portion of the top or extension 30 of one of the radial arches 29. This bar extends at right angles to the arch extension, the opposite end of the bar resting upon and being supported by the ledge 32 and the intermediate portion ofthe bar being supported by the top or extension 30 of one of the other arches. The other bars 35 are supported in like manner. These bars, being of greater length than the bar 35, are shown as supported by two or more arch extensions. A certain number of the bars, 35 will be supported at one end by the ledge 31, with which the extensions 30 merge, by one or more of the arch extensions 30, and by the ledge 31. The bars may be of any substantial heat-resistant material, such as steel billets, or concrete beams reenforced by metal. The bars are arranged parallel with each other and equidistantly apart, the arrangement shown being such that two of the bars will rest throughout their lengths upon arch extensions-see 35 The bars are so arranged that the distances between their longitudinal centers will be equal to the length of the bottom or supporting course of bricks or blocks. For instance, these bricks or blocks may be 1l x6x3". The blocks, indicated at 36, are stood on edge upon the bars 3535, with their ends at the longitudinal centers of said beams. The blocks which contact with the walls 4 and 5 will be broken or formed into bats of appropriate shape for this purpose; but the arrangement permits the use of a course of single unit blocks 36 for the foundation course of the checker work. This arrangement is shown in quadrant 0 on Fig. 2 of the drawing.

For the next course and the succeeding courses, blocks or bricks of smaller size are employed. For instance, with blocks of the dimensions given for the bottom or foundation course, the blocks in the checker work thereabove may be 9"xel-}"x2 l-", the blocks 36 being laid in rows the longitudinal centers whereof are 52-" apart or half the length of such blocks. The bars 35, 35' and 35' are preferably square in section and, with the arrangement shown herein may be 4 square. 1

lVith this arrangement, the checker-work blocks 3.7 may be laid at right angles to the blocks 36 and are of such length as to be supported at their central portions by one of the blocks 36, with their ends overlapping about 5; on the blocks 36 located on each side of such central block. This will leave between the ends of adjacent blocks 37 a space on the blocks 36, which supports such ends, suflicient for a similar block 3?, arranged at right angles to the first mentioned blocks and extending longitudinally of the block 36. As each block 36 has a length equal to the combined length and thickness of a block 37, 37*, it can support two of the last mentioned blocks, one extending longitudinally thereof and the other arranged at right angles thereto;

' The blocks in courses above that shown in quadrant d of Fig. 2 will be of the same size as the blocks in such quadrant, and may be superposed directly upon the blocks of the courses therebeneath, respectively. This arrangement enables us to employ, as pointed out hereinbefore, a single unit size block for the foundation course and a single unit size block for the remaining or checker work courses thereabove, and these blocks may be conveniently made as bricks. 1

In operation gas for preheating purposes will be admitted through conduit 12 to the central combustion chamber 1 1- and there ignited. The burning gases and products of combustion will ascend the chamber 14 beneath the .dome 6 and will then pass downwardly through the checker work in cham-' 'ber 28, heating the same, the gases being collected in the flue 2 and'being discharged through the connection 33*, the cover 34. having been removed for this purpose and the connection having been placed in communication with the chimney. After the preheating operation, cold air will be admitted through the connection 33 to the flue 2,will ascend through the checker work in the chamber 28 and pass downwardly tl'irough the central chamber 14 and outwardly through the conduits 15, 19 and20, the valve 21 being opened for this purpose. 1

Suitable clean out openings 38 are pro vided for the fiue 2, said openings being provided with covers 39. The conduit 15 will be provided with a similar cover 40 and the gas supply conduit 12 with a cover or valve 4-1.

The blocks 36 of the lower or supporting course and the blocks 37 37 of each course thereabove will be of refractory material, preferably brick. While we have given the dimensions of blocks herein, it will be understood that these dimensions are for purposes of illustration. For instance, the blocks 36 may be made of greater thickness than specified herein, should it be found desirable to provide a wider margin on each side of the blocks 37 for the support of the ends of the blocks 37. Furthermore, it isnot necessary that the blocks or each checker Work course coincide in position with the supporting blocks of the course therebeneath,

Having thus described our invention, What we claim is 1. In a hot blast stove, the combination of an inner wall enclosing a central chamber and an outer wall rorming with the inner wall an annular chamber surrounding the central chamber, arches extending radially between the inner and the outer wall, each arch having a flat top, transverse parallel bars supported on said arches, and checker work supported by said bars.

2. In a hot blast stove, the combination of an inner wall enclosing a central chamber and an outer wall surrounding the inner wall and forming therewith an annular chamber, annular ledges projecting respectively outwardly from the inner wall and inwardly from the outer wall near the bottom of said chamber, arches extending radially from the inner wall to the outer wall beneath said ledges, transverse parallel bars supported by said arches and said ledges, and checker work supported by said bars.

3. In a hot blast stove, the combination of an inner wall enclosing a central chamber and an outer wall surrounding the inner wall and forming therewith an annular chamber, annular ledges projecting respectively outwardly from the inner wall and inwardly from the outer wall near the bot tom of said chamber, arches extending radially from theinner wall to theouter wall beneath said ledges, said arches having fiat tops in the plane or said ledges, transverse parallel bars supported by the tops of said arches and said ledges, and checker work supported by said bars.

at. In a hot blast stove, the combination or an inner wall providing a central chamber, an outer wall surrounding the inner wall and forming therewith an annular chamber, equidistantly spaced parallel bars in the lower portion of said annular chamber, means for supporting said bars, parallel blocks having their ends supported on the longitudinal centers of adjacent bars, and a course of blocks supportedon the first mentioned blocks, said course comprising blocks of a smaller size than the first mentioned blocks, some of the blocks of the second course being mounted upon and exe tending longitudinally of the first mentioned blocks and other blocks of such second course being arranged at right angles to the first mentioned blocks and having their ends supported on the marginal portions thereof, and their central portions su ported each by one of the first mentioned b ocks.

5. In a hot blast stove the combination of an inner wall providing a central chamber, an outer wall surrounding the inner wall and forming therewith a chamber, equidistantly spaced parallel bars in said chain berymeans for supporting said bars, parallel blocks having their ends supported on the longitudinal centers of adjacent bars, 7

supported on the marginal portions of the first mentioned blocks. j I

6. In a hot blast stove the combination of an inner wall providing a central cham ber therewithin, an outer wall surrounding the inner wall and forming therewith a chamber, bars interposed between the inner and outer walls of said chamber, said bars being arranged parallel and equidistantly spaced, a course of parallel blocks each of which extends between and is supported by adjacent bars, and a course of blocks supported by the first mentioned blocks, the length or each block of the first course being at least equal to the combined length and thickness of one of the blocks of the second course and each being of greater thickness than the blocks of the second course whereby certain blocks of the second course may extend lengthwise of the blocks of the first course leaving marginal edges on such blocks of the first course adapted to support the ends of other blocks of the second course which extend at right angles to the blocks thus supported on the central portions of the blocks of the first course.

7 In a hot blast stove, the combination of an inner wall providing a central chamber therewithin, an outer Wall surrounding the inner wall and forming therewithi an annular chamber, bars interposed between the inner and outer walls near the bottom of the said annular chamber, said barsbeing arranged parallel and equidistantly spaced, a course of parallel blocks each of which extends between and is supported by adjacent bars, and a course of blocks supported by the first mentioned blocks, the lengthof each block of the first course being at least equal to the combined length and thickness of one of the blocks of the second course, the distance between longitudinal centers of the first mentioned blocks being equal to half the length of such blocks and each such block being of greater thickness than the blocks of the second course, whereby certain blocks of the second course may extend lengthwise of the blocks of the first course leaving marginal edges on such blocks of the first course adapted to support the ends of other blocks of the second course which extend at right angles to the ledge projecting toward the other, bars supported by said ledges, and checker Work sup- 10 ported by said bars. o

In testimony whereof, We hereunto aflix our signatures.

LOUIS'M. HARTWIGK. PATRICK J. BROWN. 

